<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>留言板</title>
    <style>
        .container {
            width: 350px;
            height: 300px;
            margin: 0 auto;
            /* border: 1px black solid; */
            text-align: center;
        }

        .grey {
            color: grey;
        }

        .container .row {
            width: 350px;
            height: 40px;

            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .container .row input {
            width: 260px;
            height: 30px;
        }

        #submit {
            width: 350px;
            height: 40px;
            background-color: #f8c203;
            color: white;
            border: none;
            margin: 10px;
            border-radius: 5px;
            font-size: 20px;
        }
    </style>
</head>

<body>
<div class="container">
    <h1>留言板</h1>
    <p class="grey">输入后点击提交, 会将信息显示下方空白处</p>
    <div class="row">
        <span>谁:</span> <input type="text" name="" id="from">
    </div>
    <div class="row">
        <span>对谁:</span> <input type="text" name="" id="to">
    </div>
    <div class="row">
        <span>说什么:</span> <input type="text" name="" id="say">
    </div>
    <input type="button" value="提交" id="submit" onclick="submit()">
    <!-- <div>A 对 B 说: hello</div> -->
</div>

<script src="js/jquery.min.js"></script>
<script>

    $.ajax({
        type: "get",
        url: "massage/getList",
        success: function (massages) {
            if (massages != null) {

                var p = "";

                for (var m of massages) {
                    p += "<div>" + m.from + "对" + m.to + "说" + m.say + "</div>";
                }
                $(".container").append(p);
            }
        }
    })

    function submit() {
        //1. 获取留言的内容
        var from = $('#from').val();
        var to = $('#to').val();
        var say = $('#say').val();
        if (from == '' || to == '' || say == '') {
            alert("补充完整");
        }


       $.ajax({
           type: "post",
           url: "massage/publish",
           contentType: "application/json",
           data: JSON.stringify({
               from: from,
               to: to,
               say: say
           }),
           success: function (r) {

               if (r.ok == 1) {
                   var p = "<div>" + from + "对" + to + "说" + say + "<div>" ;
                   $(".container").append(p);

                   $("#from").val("");

                   $("#to").val("");
                   $("#say").val("");

               } else {

                   alert("留言发布失败");
               }
           }

       });


    }

</script>
</body>

</html>